As the next generation Global Compact Car platform from GM debuts over the next couple of years, one of the variants that's coming is a compact MPV. Currently, Opel has a Delta-based MPV called the Zafira which will be joined by a Chevrolet version that has now been spotted testing. The Chevy Tacuma will be built in Detroit alongside the Volt at the Hamtramck assembly plant. The Tacuma will be about the size of the Mazda 5 although judging from these photos it doesn't look this one will have sli